20211022001 has 4 divisors (see below), whose sum is σ = 21089762112. Its totient is φ = 19332281892.

The previous prime is 20211021991. The next prime is 20211022021. The reversal of 20211022001 is 10022011202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20211022001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20211022021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439370021 + ... + 439370066.

It is an arithmetic number, because the mean of its divisors is an integer number (5272440528).

Almost surely, 2^20211022001 is an apocalyptic number.

It is an amenable number.

20211022001 is a deficient number, since it is larger than the sum of its proper divisors (878740111).

20211022001 is an equidigital number, since it uses as much as digits as its factorization.

20211022001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878740110.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20211022001 its reverse (10022011202), we get a palindrome (30233033203).

The spelling of 20211022001 in words is "twenty billion, two hundred eleven million, twenty-two thousand, one".